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Finding the Fourth Proportional to 611,269.41, 916,860.83 and 161,980.33

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Solution

The fourth proportional to 611,269.41, 916,860.83 and 161,980.33 is: 242,959.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,269.41 : 916,860.83 = 161,980.33 : x
  2. Step 2: Convert to fraction form
    611,269.41/916,860.83 = 161,980.33/x
  3. Step 3: Cross multiply
    611,269.41x = 916,860.83 × 161,980.33
  4. Step 4: Simplify right side
    611,269.41x = 148,513,419,807.47
  5. Step 5: Solve for x
    x = 148,513,419,807.47/611,269.41
  6. Step 6: Final answer
    x = 242,959.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.